135 lines
4.3 KiB
C#
135 lines
4.3 KiB
C#
//------------------------------------------------------------------------------
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// <copyright file="XmlILAnnotation.cs" company="Microsoft">
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// Copyright (c) Microsoft Corporation. All rights reserved.
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// </copyright>
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// <owner current="true" primary="true">[....]</owner>
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//------------------------------------------------------------------------------
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using System;
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using System.Reflection;
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using System.Xml.Xsl.Qil;
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namespace System.Xml.Xsl.IlGen {
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/// <summary>
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/// Several annotations are created and attached to Qil nodes during the optimization and code generation phase.
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/// </summary>
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internal class XmlILAnnotation : ListBase<object> {
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private object annPrev;
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private MethodInfo funcMethod;
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private int argPos;
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private IteratorDescriptor iterInfo;
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private XmlILConstructInfo constrInfo;
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private OptimizerPatterns optPatt;
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//-----------------------------------------------
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// Constructor
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//-----------------------------------------------
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/// <summary>
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/// Create and initialize XmlILAnnotation for the specified node.
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/// </summary>
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public static XmlILAnnotation Write(QilNode nd) {
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XmlILAnnotation ann = nd.Annotation as XmlILAnnotation;
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if (ann == null) {
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ann = new XmlILAnnotation(nd.Annotation);
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nd.Annotation = ann;
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}
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return ann;
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}
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private XmlILAnnotation(object annPrev) {
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this.annPrev = annPrev;
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}
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//-----------------------------------------------
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// Annotations
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//-----------------------------------------------
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/// <summary>
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/// User-defined functions and global variables and parameters are bound to Clr MethodInfo objects.
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/// Attached to Function, global Let, and global Parameter nodes.
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/// </summary>
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public MethodInfo FunctionBinding {
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get { return this.funcMethod; }
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set { this.funcMethod = value; }
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}
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/// <summary>
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/// Function arguments are tracked by position.
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/// Attached to function Parameter nodes.
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/// </summary>
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public int ArgumentPosition {
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get { return this.argPos; }
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set { this.argPos = value; }
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}
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/// <summary>
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/// The IteratorDescriptor that is derived for Qil For and Let nodes is cached so that it can be used when the
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/// For/Let node is referenced.
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/// Attached to For and Let nodes.
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/// </summary>
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public IteratorDescriptor CachedIteratorDescriptor {
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get { return this.iterInfo; }
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set { this.iterInfo = value; }
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}
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/// <summary>
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/// Contains information about how this expression will be constructed by ILGen.
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/// Attached to any kind of Qil node.
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/// </summary>
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public XmlILConstructInfo ConstructInfo {
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get { return this.constrInfo; }
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set { this.constrInfo = value; }
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}
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/// <summary>
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/// Contains patterns that the subtree rooted at this node matches.
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/// Attached to any kind of Qil node.
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/// </summary>
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public OptimizerPatterns Patterns {
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get { return this.optPatt; }
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set { this.optPatt = value; }
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}
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//-----------------------------------------------
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// ListBase implementation
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//-----------------------------------------------
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/// <summary>
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/// Return the count of sub-annotations maintained by this annotation.
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/// </summary>
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public override int Count {
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get { return (this.annPrev != null) ? 3 : 2; }
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}
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/// <summary>
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/// Return the annotation at the specified index.
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/// </summary>
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public override object this[int index] {
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get {
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if (this.annPrev != null) {
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if (index == 0)
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return this.annPrev;
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index--;
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}
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switch (index) {
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case 0: return this.constrInfo;
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case 1: return this.optPatt;
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}
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throw new IndexOutOfRangeException();
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}
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set {
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throw new NotSupportedException();
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}
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}
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}
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}
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